Home / 3,881.28-5,356.08-2,112.93

Finding the Fourth Proportional to 3,881.28, 5,356.08 and 2,112.93

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Solution

The fourth proportional to 3,881.28, 5,356.08 and 2,112.93 is: 2,915.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.28 : 5,356.08 = 2,112.93 : x
  2. Step 2: Convert to fraction form
    3,881.28/5,356.08 = 2,112.93/x
  3. Step 3: Cross multiply
    3,881.28x = 5,356.08 × 2,112.93
  4. Step 4: Simplify right side
    3,881.28x = 11,317,022.11
  5. Step 5: Solve for x
    x = 11,317,022.11/3,881.28
  6. Step 6: Final answer
    x = 2,915.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.